EP0439379A1 - Elastische Verbindung zwischen einer treibenden und einer getriebenen Welle - Google Patents

Elastische Verbindung zwischen einer treibenden und einer getriebenen Welle Download PDF

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Publication number
EP0439379A1
EP0439379A1 EP91400028A EP91400028A EP0439379A1 EP 0439379 A1 EP0439379 A1 EP 0439379A1 EP 91400028 A EP91400028 A EP 91400028A EP 91400028 A EP91400028 A EP 91400028A EP 0439379 A1 EP0439379 A1 EP 0439379A1
Authority
EP
European Patent Office
Prior art keywords
base
shaft
elastic
branches
elastic link
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP91400028A
Other languages
English (en)
French (fr)
Other versions
EP0439379B1 (de
Inventor
André Blin
Maurice Philipot
Alain Bonnet
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Giat Industries SA
Original Assignee
Giat Industries SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Giat Industries SA filed Critical Giat Industries SA
Publication of EP0439379A1 publication Critical patent/EP0439379A1/de
Application granted granted Critical
Publication of EP0439379B1 publication Critical patent/EP0439379B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
    • F16D3/02—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive adapted to specific functions
    • F16D3/04—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive adapted to specific functions specially adapted to allow radial displacement, e.g. Oldham couplings

Definitions

  • the technical sector of the present invention is that of the connection means between a drive shaft and a receiver shaft.
  • connection means have already been proposed between a driving shaft and a receiving shaft constituted here by a fin. These consist of a constant velocity joint, for example an Oldham joint, and allow tolerance of an axial alignment defect.
  • Patent EP114895 describes an Oldham joint comprising two extensions integral with a disc and which have orthogonal orientations from one another.
  • extensions are split and are positioned in complementary housings arranged on the axes of the engine and the receiver.
  • Each of the branches which constitutes an extension comes into resilient abutment on the walls of the housing which makes it possible to cancel the games without disturbing the transmission of the torque; in fact, in such a configuration, the latter does not have the effect of bringing the branches closer to the extensions.
  • Document GB388961 describes a device ensuring the transmission of a torque between the engine of a locomotive and the wheels, and which is constituted by a connecting element comprising two symmetrical arms and a housing whose orientation is substantially normal to that of arms.
  • This device allows limited relative movements of the axis of the wheels relative to that of the motorization in the two normal directions thus defined by the connecting element.
  • a device designed for railway mechanics is ill-suited to use in precision mechanics on the one hand because of the difficulties there are in obtaining tolerances ensuring transmission without play and on the other hand the difficulty of carry out the final assembly in the absence of clearances.
  • the purpose of the present invention is to provide an elastic link of reduced overall size but making it possible to connect under a given torque and for a maximum misalignment a driving shaft to a receiving shaft, this link being able to communicate fully and faithfully the receiving shaft any angular displacement of the driving shaft whatever the direction of rotation and the amplitude.
  • the subject of the invention is an elastic link connecting a driving shaft to a receiving shaft, characterized in that it consists of a substantially flat base engaged in an imprint of substantially the same profile and formed in the receiving shaft, l base having a housing inside which the drive shaft is engaged, elastic link comprising on the one hand at least one arm comprising two branches, separated by a slot substantially normal to the plane of the base, at least one branch being deformable and ensuring constant support on the walls of the cavity, and on the other hand at least one strip in constant support on the drive shaft and obtained by cutting the base itself in the vicinity of the housing to form at least partially the surface of the housing in contact with the motor shaft, the assembly ensuring a connection between the drive shaft and the drive shaft.
  • the elastic link is such that the slot separating the branches does not extend to the base itself.
  • the elastic link is such that the free end of the strip is set back relative to the motor shaft.
  • the elastic link is such that at least one of the branches carries a bulge limiting the maximum approximation of the branches.
  • the elastic link may include two arms placed on either side of the base along its axis XX ′ of symmetry.
  • the two branches can be deformable in approximation to absorb assembly clearance between the receiving shaft and the base.
  • the elastic link may include two elastic strips integral with the base, the free ends of which are placed on either side of the axis XX ′.
  • the base can be made from an elastic steel of type 45S7.
  • An advantage of the present invention lies in the fact that the link ensures a backlash-free connection of the two shafts regardless of their alignment.
  • Another advantage lies in the possibility of very precisely adjusting the characteristics of the link according to the torque to be transmitted.
  • Another advantage lies in the reduced size of the link while retaining ease of mounting in a blind housing.
  • the link 1 for connecting a motor shaft 2 to a receiving shaft 3.
  • the shaft 3 is provided with a footprint 4 inside which is arranged the link 1
  • This consists of a base 5, which is a substantially flat metal plate, and which is equipped with elastic connection means.
  • the first elastic means consists of two arms 6 and 7 symmetrically secured to the base along an axis XX ′. Each arm has two branches 8 and 9 exerting a continuous force on the walls 10 and 11 of the imprint.
  • the arms are thus separated by a slot which is substantially normal to the plane of the base and which does not extend to the base 5 itself.
  • Each branch is provided with a bulge 12 which is intended to limit the maximum approximation of the latter.
  • the base has dimensions such that there is a mounting clearance (a), between it and the impression made in the receiving shaft, in the direction of the axis of symmetry XX ′.
  • the base 5 comprises a housing 13 substantially parallelepiped, the length of which is parallel to an axis YY ′ perpendicular to the axis XX ′.
  • This housing receives the drive shaft 2, with a clearance (b) in a direction parallel to this axis YY ", to compensate for the misalignment of the drive shaft.
  • the axes XX ′ and YY ′ and the axis of rotation (not shown) of the motor shaft 2 are substantially concurrent at point O.
  • the second elastic means constituted here by two strips 14 and 15, in constant support on the motor shaft. These two strips are obtained by laser cutting in the mass of the base 5, along a slot 16 substantially normal to the plane of the base. The width of the slot allows you to set the maximum travel of the slats.
  • Such a method of obtaining the lamellae makes it possible to precisely adjust the stiffness of the latter, therefore the torque which they are capable of supporting without excessively weakening the lamellae and base.
  • the strip will come into contact with the base and the torque will be transmitted without deterioration of the link.
  • This structural variant also makes it possible to authorize force overruns without damaging the slats.
  • the motor shaft then coming into contact with the remaining wall of the housing 13 of the base itself.
  • the slats are calculated dimensionally as a function of the torque to be transmitted.
  • the arms branches are also calculated dimensionally according to the torque to be transmitted, but an overshoot of effort will not disturb the transmission of the movement either.
  • the arms will come into contact with the walls of the imprint at the part of the arm which is not split.
  • This part of the arm being provided is sufficiently rigid to be able to transmit the torque.
  • a significant overshoot may also have the effect of bringing the bulges 12 of the two branches into mutual contact, which will further ensure the transmission of the torque.
  • the link according to the invention ensures a clearance without play of the torque although the torque has a direction such that it acts on the elastic means.
  • the link 1 is preferably produced from a spring steel of the 45S7 type which gives the arms 6 and 7 and the strips 14 and 15 an elasticity in relation to the torque to be transmitted.
  • FIG 2 there is shown a section showing the integration of the link 1 between a drive shaft 17 and the support 18 of a fin 19 shown in the folded position.
  • the fins are deployed by pivoting around the axis 21.
  • the shaft 17 driven by the motor 22 ensures the control of the fin and for more precision on the structure drawn in the figure we can refer to the cited patent.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Toys (AREA)
  • Transmission Devices (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
EP19910400028 1990-01-25 1991-01-09 Elastische Verbindung zwischen einer treibenden und einer getriebenen Welle Expired - Lifetime EP0439379B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9000869 1990-01-25
FR9000869A FR2657404A1 (fr) 1990-01-25 1990-01-25 Lien elastique entre un arbre moteur et un arbre recepteur.

Publications (2)

Publication Number Publication Date
EP0439379A1 true EP0439379A1 (de) 1991-07-31
EP0439379B1 EP0439379B1 (de) 1993-10-20

Family

ID=9393101

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910400028 Expired - Lifetime EP0439379B1 (de) 1990-01-25 1991-01-09 Elastische Verbindung zwischen einer treibenden und einer getriebenen Welle

Country Status (3)

Country Link
EP (1) EP0439379B1 (de)
DE (1) DE69100514T2 (de)
FR (1) FR2657404A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2708061A1 (fr) * 1993-07-23 1995-01-27 Cepem Système d'accouplement à rattrapage de jeu entre deux pièces d'axes parallèles.
EP2000687A1 (de) * 2007-06-07 2008-12-10 Compagnie Plastic Omnium Eine Oldham-Kupplung bildendes Bauteil

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB388961A (en) * 1932-05-10 1933-03-09 Westinghouse Electric & Mfg Co Improvements in or relating to torque-transmitting connections for use in locomotivedrives
EP0114895A1 (de) * 1982-07-27 1984-08-08 Fanuc Ltd. Kupplung eines stellmotors mit einem winkelaufnehmer
DE3438718A1 (de) * 1984-10-23 1986-04-24 Novotechnik GmbH Meßwertaufnehmer, 7302 Ostfildern Praezisionskupplung fuer die winkelgetreue uebertragung rotatorischer bewegungen
DE3543025A1 (de) * 1985-01-17 1986-07-17 VMA - NC Mess- und Antriebstechnik GmbH, 8752 Mainaschaff Bewegliche kupplung

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB388961A (en) * 1932-05-10 1933-03-09 Westinghouse Electric & Mfg Co Improvements in or relating to torque-transmitting connections for use in locomotivedrives
EP0114895A1 (de) * 1982-07-27 1984-08-08 Fanuc Ltd. Kupplung eines stellmotors mit einem winkelaufnehmer
DE3438718A1 (de) * 1984-10-23 1986-04-24 Novotechnik GmbH Meßwertaufnehmer, 7302 Ostfildern Praezisionskupplung fuer die winkelgetreue uebertragung rotatorischer bewegungen
DE3543025A1 (de) * 1985-01-17 1986-07-17 VMA - NC Mess- und Antriebstechnik GmbH, 8752 Mainaschaff Bewegliche kupplung

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2708061A1 (fr) * 1993-07-23 1995-01-27 Cepem Système d'accouplement à rattrapage de jeu entre deux pièces d'axes parallèles.
EP2000687A1 (de) * 2007-06-07 2008-12-10 Compagnie Plastic Omnium Eine Oldham-Kupplung bildendes Bauteil
FR2917142A1 (fr) * 2007-06-07 2008-12-12 Plastic Omnium Cie Piece formant noix d'oldham.

Also Published As

Publication number Publication date
DE69100514T2 (de) 1994-02-24
DE69100514D1 (de) 1993-11-25
FR2657404A1 (fr) 1991-07-26
EP0439379B1 (de) 1993-10-20

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